<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org" xmlns:layout="http://www.ultraq.net.nz/web/thymeleaf/layout">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<header>这是母版头部</header>
<div>这是母版内容</div>
<footer>这是母版底部</footer>
</body>
</html>